JP2003125535A - Electrical power charge unit price change system by measurement of quantity demanded - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain generation of facility investment and energy production more than necessary, in consideration of peak power demand by leveling the power demand. SOLUTION: This system is provided with a power user terminal, connected to a power supplier server via a network, a power demand measuring means for estimating the power demand based on the utility time of an apparatus on power user side, and a power charge unit price changing means which has an electrical charge unit price function with the power demand as a variable and calculates the power charge unit price, based on the measured power demand, and outputs the electrical charge unit price to the power user terminal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power charge unit price changing system by measuring demand.

[0002]

2. Description of the Related Art Electric power is difficult to store and the amount of supply cannot be finely controlled due to the characteristics of power generation equipment. Therefore, it is necessary to control capital investment and supply in line with peak demand. as a result,
Unnecessary wasted capital investment and energy production are being carried out.

Conventionally, each electric power company sets an hourly charge unit price using a nighttime heat storage type device in order to equalize the electric power demand (see, for example, FIG. 9). this is,
The purpose is to reduce electricity usage during the daytime when demand is high and increase electricity consumption during the night when demand is low.

[0004]

However, the conventional method requires a dedicated device such as a night heat storage type device, and is difficult to adapt to the user's life cycle / lifestyle (weekdays and holidays). It is difficult for general households to use. In addition, electric power demand often fluctuates due to disturbances such as the outside temperature, and it is not possible to perform detailed power demand control with the unit price unchanged during the same time period.

The present invention is to solve the above-mentioned conventional problems, and by leveling the power demand, it is possible to reduce the unnecessary capital investment and energy production at the peak time. The purpose of the present invention is to provide a power unit price change system according to.

[0006]

In order to achieve the above object, the invention according to claim 1 is a power user side terminal connected to a power supplier side server via a network, and a power supplier side server. In, the power demand amount measuring means for predicting the power demand amount based on the usage time of the equipment on the side of the power user and the power rate unit price function with the power demand amount as a variable And an electric power unit price changing means for calculating an electric power unit price according to claim 1, wherein the changed electric power unit price is output to the electric power user side terminal. The utilization time of the equipment is predicted by the action schedule of each member of the electric power user, and the invention according to claim 3 relates to a terminal on the electric power user side connected to a server on the electric power supplier side via a network. In the power supplier side server, the power demand amount measuring means for measuring the power demand amount based on the power consumption measuring means on the power user side and the power rate unit price function with the power demand amount as a variable are measured. The invention according to claim 4 is characterized in that it comprises an electric power unit price changing unit for calculating an electric power unit price according to an amount of electric power demand, and outputs the changed electric power unit price to a power user side terminal. Item 1
3 to 3, the power unit price function is changed for each power supply area.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 are diagrams for explaining the principle of the power charge unit price change system by measuring the demand amount according to the present invention.

FIG. 1 is a simple demand curve for ordinary goods (the curve is shown as a straight line in the following figures). In the case of ordinary goods, the demand amount decreases according to the demand law, and the demand amount increases when the price decreases. That is, the price is p1 higher than p0
If set to, the demand will decrease from d0 to d1, and conversely the price will be p0.
Setting to cheaper p2 increases demand from d0 to d2.
The demand amount D is shown as a function of the price P (D = F (P)).

Since electric power is considered to be an ordinary good, the relationship between the amount of electric power demand and the unit price of electric power can be explained with reference to FIG. FIG. 2 shows a simple electric power demand curve at an arbitrary time point t, and the relationship between the electric power demand amount PDt and the electric power unit price PP at an arbitrary time point t is shown by Pdt = Ft (PP). If the unit price is fixed Pp0 as in the current ordinary contract, it increases from Pd0 to Pd2 during the time period t1 when the power demand is high, and the relationship between the power demand PDt1 and the power unit price PP is Pdt1 = Shift up with Ft1 (PP). On the contrary, in the time t2 when the power demand is small
Power demand Pdt2 and power unit price PP decreased from Pd0 to Pd1
The relationship of shifts downward with Pdt2 = Ft2 (PP).

That is, the electric power demand is measured by some method, and the unit price of electric power is Pp0 in the time zone t1 where the electric power demand is large.
By setting Pp1 to a higher value, Pp2 that is lower than Pp0 in the time period t2 where the power demand is small, and Pp2 that is lower than Pp0, and setting the power unit price flexibly according to the power demand, the power demand is limited to Pd0. In principle, it is possible to control towards leveling. For that purpose, it is necessary to measure the power demand by some method.
For measuring the power demand, "Method of predicting the power demand"
And there is "a method of directly measuring the amount of electricity used".

FIG. 3 is a block diagram showing an embodiment of the power charge unit price changing system by measuring the demand amount according to the present invention.
The present embodiment employs the above-mentioned “method of predicting the power demand amount” for measuring the power demand amount.

The power supplier side server 1 is connected to a large number of power user side terminals 2 via a network and exchanges information as indicated by arrows in the figure.
The power supplier server 1 includes a supplier database 1a.
The current season, time, weather, outside temperature,
Event schedule (for example, high school baseball), daily electricity demand pattern (daily fluctuation, weekly fluctuation, yearly fluctuation, etc.)
Data such as is stored. On the other hand, the user side database 2a is prepared in the power user side terminal 2 and stores data such as family structure, schedule of family members, equipment and the like.

Electric power demand measuring means 1 in this embodiment
In item b, the above-mentioned “method of predicting power demand” is adopted. This is a method of accumulating the micro-level forecast power demand demanded for each user. That is, the current season and time of the supplier side database 1a,
The usage time of equipment is predicted based on data such as weather, outside temperature, event schedule, and daily electricity demand pattern, and data such as the family structure of the user-side database 2a, the schedule of each family member, and equipment. Predict power demand.

If the data for each user is not collected quantitatively, the total amount of power demand is macro-leveled from disturbances such as temperature and weather and daily power demand patterns (daily fluctuation, weekly fluctuation, annual fluctuation, etc.). It is also possible to make a simple prediction with. Although it is not possible to respond to sudden and unpredictable demand fluctuations, it has the advantage that users can easily grasp the changes in the electricity rate unit price in advance.

When the power demand amount measuring means 1b determines the power demand amount, the power charge unit price changing means 1c calculates and changes the power charge unit price based on the power demand amount. It is not necessary to strictly determine the electricity rate unit price PP from the demand law as shown in Fig. 2, but an arbitrary electricity rate unit price function PP = F (PD) is set to the measured electricity demand amount PD. It should be decided in real time accordingly.

When the power rate unit price is changed by the power rate unit price changing means 1c, the changed power rate unit price and the power consumption measuring means (power meter) 2c on the side of the power user are calculated by the power rate calculating means 1d. The electric power charge is calculated by integrating the electric power usage amount measured in.

The unit price of electric power, the amount of electric power used and the electric power charge calculated as described above are used for the terminal 2 on the electric power user side.
Is transmitted to the display / output means 1b. The user considers the use of equipment (electrical appliances) while observing the power unit price that fluctuates like the stock price. Further, the electric appliance may be provided with a function of connecting to a network to display the unit price of electric power, a function of determining a change in the unit price of electric power, and automatically controlling operation control. If you have a power generation facility (in-house power generation, fuel cell, etc.) that is different from the supplied power, install a device that compares costs and automatically selects power.

FIG. 4 is a block diagram showing an embodiment of the power charge unit price changing system by measuring the demand amount according to the present invention.
The present embodiment employs the above-mentioned “method of directly measuring the power demand amount” for measuring the power demand amount. It should be noted that the same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

The "method of directly measuring the amount of electric power used" is the accumulation of the amount of electric power used by the electric power consumption measuring means (electricity meter) 2c installed for each user, or grasped by the electric power supplier side. This is a method of measuring the amount of power used at that point in real time from the available physical amount of power (voltage, current, amount of power transmission, etc.). Since the unit price of electric power changes from moment to moment, it is not possible to grasp the change in the unit price of electric power in advance, but it is possible to deal with a sudden change.

It is also possible to measure the power demand amount by combining the "method of predicting the power demand amount" and the "method of directly measuring the power consumption amount".

The unit of the power supply area in which the power charge unit price changing system is introduced can be arbitrarily determined. Facilities with different fluctuations in power demand within the area,
For example, by combining a commercial facility (such as a factory) that has a large power demand during the daytime on weekdays and a residential facility that has a large power demand during weekday nights and holidays, it is possible to further level the power demand. It is also possible to change the electricity rate unit price function for each area, and as a result, the number of factors by which the user selects the area increases, which leads to activation of the area.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made. For example, in the above-described embodiment, the electric power is limited to the power supply that is difficult to control, but the present invention can be applied to the supply of water, gas or the like. Since water and gas can be stored, it is relatively easy to control supply, but if the unit price change system is used and the weekly and seasonal fluctuations are leveled, it is possible to minimize capital investment. .

Next, a method of predicting all energy demands such as electric power, gas and water will be described with reference to FIGS. This is due to the internal factors of each family (family structure,
This is a method of predicting the energy use schedule of the day based only on the action schedule of each member based on the usage tendency of equipment, living schedule, etc.) and external factors (utility bill, season, time, weather, etc.). The most basic information for prediction is the action schedule of each member, and based on this information, the energy usage time and the total energy load of the equipment in hourly units are predicted.

When calculating the energy use of each household,
Rough calculations can be made from the equipment, but it is not possible to see, for example, the temporal fluctuations of the day.

Therefore, as shown in FIG. 5, the usage time of the living room used by each member is estimated based on the action schedule (outing, eating, washing, cooking, etc.) of each member A to D, and Estimate the usage time of equipment in the room. Basic meal,
By simply specifying the time for going out, taking a bath, etc., you can predict the equipment usage time before and after that, the duplication of each member, the usage status of each individual room, and the usage time of basic energy sources such as electricity, gas, and water. Infer. For calculation, a database based on surveys and simulations of ordinary households is used, and reference is made to forecast data for outside temperature, humidity, and weather. Figure 6 shows specific equipment (eg air conditioners)
Shows the usage forecast.

It is premised that the schedule of each member is accurately described. However, if there is no description, the same day of the previous week is used as a reference for calculation. Further, the operation information of each equipment is registered as a schedule prediction database, and for a schedule that each member cannot fill in, a complementary calculation is performed according to the operation record of the equipment. Then, based on the energy utilization load simulation of all equipment,
Calculate the uptime load forecast, as shown in.

Based on the above data, the planned equipment operating time is compared with the energy usage of each equipment,
The demand energy curve is derived, and the calorific value is calculated based on the unit price of each energy use as a charge or energy conversion. FIG. 8 shows the energy use forecast for the day in units of hours (minutes).

According to this method, it is possible to predict the daily energy use situation for each house, and therefore it is possible to accurately grasp the prediction of the total energy demand. Also,
By presenting these data, it is possible to raise awareness of energy saving based on concrete data. Furthermore, by combining this data with a guidance system, etc., it is possible to respond not only to simple predictions, but also to the situation on the spot.

[0029]

As is apparent from the above description, according to the present invention, the power demand side is leveled, which is an advantage of the power supplier side. It is possible to reduce production, and as a result, it is possible to realize cost saving and energy saving.

Further, as a merit on the side of the user, it is possible to reduce the electric power charge by efficiently using the electric appliances when the electric power unit price is low, and indirectly by using the electric power unit price as a reference. It is possible to raise the energy saving awareness of the user.

Furthermore, by changing the electricity charge unit price function for each electricity supply area, it leads to differentiation of areas or regions, widens the range of choices of users, and becomes a strong factor for attracting various facilities. .

[Brief description of drawings]

FIG. 1 is a diagram for explaining the principle of a power charge unit price changing system according to the demand amount measurement of the present invention.

FIG. 2 is a diagram for explaining the principle of the power charge unit price change system by measuring the demand amount according to the present invention.

FIG. 3 is a configuration diagram showing an embodiment of a power charge unit price changing system by demand measurement according to the present invention.

[Fig. 4] Fig. 4 is a configuration diagram showing another embodiment of the power charge unit price change system by demand measurement according to the present invention.

FIG. 5 is a diagram for explaining a method of predicting energy demand.

FIG. 6 is a diagram for explaining a method of predicting energy demand.

FIG. 7 is a diagram for explaining a method of predicting energy demand.

FIG. 8 is a diagram for explaining a method of predicting energy demand.

FIG. 9 is a diagram showing a conventional power unit price.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhiro Sato             Shimizu Construction 1-3-2 Shibaura, Minato-ku, Tokyo             Within the corporation (72) Inventor Yutaka Daimon             Shimizu Construction 1-3-2 Shibaura, Minato-ku, Tokyo             Within the corporation F-term (reference) 5G064 AA07 AB03 AC01 AC09 BA02                       CB08 DA01                 5G066 KA01 KB01 KB07 KB10

Claims (4)

[Claims] 1. A power user-side terminal connected to a power supplier-side server via a network, and a power supplier-side server predicts power demand based on the usage time of equipment on the power user side. The power demand unit changing means for calculating the power demand unit price according to the measured power demand amount and having the power demand unit price function with the power demand amount as a variable. A power charge unit price change system by measuring the demand amount, which is characterized by outputting the charge unit price to a terminal on the power user side. 2. The power charge unit price change system by demand measurement according to claim 1, wherein the usage time of the equipment is predicted by the action schedule of each power user. 3. An electric power user terminal connected to an electric power supplier server via a network and an electric power supplier server measuring the electric power demand based on an electric power consumption measuring means on the electric power user side. The power demand unit changing means for calculating the power demand unit price according to the measured power demand amount and having the power demand unit price function with the power demand amount as a variable. A power charge unit price change system by measuring the demand amount, which is characterized by outputting the charge unit price to a terminal on the power user side. 4. The power charge unit price changing system by measuring the demand amount according to claim 1, wherein the power charge unit price function is changed for each power supply area.